Nidome no Yuusha - Side Story: Diary of a Certain Mage

On the distant Tianxiu Planet, there exists a group of unusual and intelligent beings. They consist of neither children nor elders. They have neither birth nor real death. They are born into the world through an extremely special process and have managed to keep their fundamental memories of survival through their endless reincarnations.

They are the Tianxiu people.

For every Tianxiu person, if they find someone they like and want to bind as partners with each other — then they would have to go through a life or death Adult Ceremony. The winner of the ceremony will become the absolute dominant in this spousal relationship.

While the defeated one will be referred to as — Qizi.

- Description from Novelupdates

A mysterious virus emerged, and countless people around the world turned into zombies. Luo Yang, a young man who was about to risk everything, receives the blessing of activating the system.Initially, he gains a massive spaceship with hundreds of subordinates and a divine-level talent.Just when Luo Yang thinks he can live peacefully aboard the ship, he discovers the system's function: to obtain rewards by allowing other survivors to live on board.But Luo Yang doesn’t want to be a savior; the spots on the spaceship are limited, and only those who pay will be allowed to live in his refuge.

Have you ever wished you exactly knew how to accomplish your dreams? Not feeling the slightest doubt anymore? Being aware at any time how every choice, action and decision of yours affects your future?

A century after the Spirit Qi Awakening, the world enters a new era. Humans are able to absorb the world’s awakened spirit qi, allowing them to tread on a new path—spirit qi occupations!